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| 1 | 孟加拉吉大港山区Khagrachari的现代和传统农业系统中土壤化学性质(英文)显示文摘由于森林覆盖面积的缩减,制度上的缺陷,人口增加和不合理的山区农业系统等因素,吉大港山区植被严重退化。孟加拉吉大港山区正在实践现代农业体系(如坡地农垦技术),它通过建立生态群落(而非传统轮垦)提高经济产量和生物多样性,这种现代农业体系提供了一种新土地开发策略。本研究对孟加拉吉大港山区Khagrachari的现代和传统农业体系中的土壤化学性质变化进行对比分析。与传统轮耕相比,实行坡地农业耕地技术的土地有较高的生产容量,含有较高的有机碳和有机物。在吉大港山区,通过发展综合农业生态系统建立稳定的生产环境,可以将轮作耕地变为相对稳定的半永久性的农业系统。 | Shampa Biswas Mark E.Swanson Jalal Uddin Md.Shoaib S.M.S.Sirajul | 2010 | Journal of Forestry Research2010，21，4： | 0 |
| 2 | Deforestation effects on biological and other important soil properties in an upland watershed of Bangladesh显示文摘Deforestation occurs at an alarming rate in upland watersheds of Bangladesh and has many detrimental effects on the environment. This study reports the effects of deforestation on soil biological properties along with some important physicochemical parameters of a southern upland watershed in Bangladesh. Soils were sampled at 4 paired sites, each pair representing a deforested site and a forested site, and having similar topographical characteristics. Significantly fewer(p≤0.001) fungi and bacteria, and lower microbial respiration, active microbial biomass, metabolic and microbial quotients were found in soils of the deforested sites. Soil physical properties such as moisture content, water holding capacity, and chemical properties such as organic matter, total N, available P and EC were also lower in deforested soils. Bulk density and pH were significantly higher in deforested soils. Available Ca and Mg were inconsistent between the two land uses at all the paired sites. Reduced abundance and biomass of soil mesofauna were recorded in deforested soils. However, soil anecic species were more abundant in deforested soils than epigeic and endogeic species, which were more abundant in forested soils than on deforested sites. | S.M. Sirajul Haque Sanatan Das Gupta Sohag Miah | 2014 | Journal of Forestry Research2014，25，4： | 0 |
| 3 | Analysis of existing agroforestry practices in Madhupur Sal forest: an assessment based on ecological and economic perspectives显示文摘A study was conducted in Madhupur sal forest of Tangail, Bangladesh to identify the suitable agroforestry practices of the area. Considering the ecological aspects of different agroforestry practices 10 sample plots (10 m × 10 m) from each land uses were taken, including natural forest to get a comparative scenario. The study showed that among the different agroforestry practices, Margalef and Shannon- Weiner index values are the maximum for pineapple agroforestry and lower for banana agroforestry, and Evenness index value is the maximum for lemon agroforestry. Determination of tree biomass in different land uses revealed that it is highest (3 078.6 kg/100 m 2 ) in natural forest fol- lowed by pineapple agroforestry, lemon agroforestry and banana agro- forestry. Soil pH, moisture content, organic matter, organic carbon, phos- phorus and total nitrogen showed statistically significant variation while bulk density, particle density, sulphur and potassium did not show any statistically significant variation among the land uses. Soil fertility status showed that pineapple agroforestry is more fertile than rest of other land uses. The Net Present Value (NPV) indicated that banana agroforestry is financially more profitable than other two systems, while the Benefit- Cost ratio (BCR) is higher in pineapple agroforestry (4.21 in participa- tory agroforestry and 3.35 in privately managed land). Even though ba- nana agroforestry gives higher NPV, capital required for this practice is much higher. The findings suggest that pineapple agroforestry has a tendency towards becoming ecologically and economically more sound than other two practices as it has better ecological attributes and required comparatively low investment. | Mohammad Golam Kibria Narayan Saha | 2011 | Journal of Forestry Research2011，22，4： | 0 |
| 4 | 黄河三角洲湿地刺槐林水文效益和生长量与气候因子的关系(英文)显示文摘研究湿地防护林水文生态效益与气候环境因子的响应是湿地生态保护与经营管理中的热点问题。本文通过自然降雨径流小区定位观测试验,定量研究了黄河三角洲湿地刺槐林地及其采伐迹地的产流产沙效果和土壤水分动态变化规律。刺槐林地与采伐迹地相比,一场降雨的径流量减少53.9%~150.8%,泥沙量减少172.8%~387.1%;刺槐林地降雨径流洪峰峰值比采伐迹地低0.8L·s-1,且径流洪峰值出现的时间比采伐迹地滞后25min;刺槐林地和采伐迹地土壤含水率随年内降水量变化分干湿两季,呈周期性变化,刺槐林地年平均含水率比采伐迹地高23.3%~25.6%,特别是雨季其含水率比采伐迹地高24.3%~29.8%。应用逐步回归分析理论和方法,建立了刺槐生态防护林高生长量与气候环境因子的回归模型,影响该地区刺槐林高生长的主导因子是光照因子,其次是水分因子,再次是热量因子。该项研究可为黄河三角湿地刺槐防护林的更新改造及其生态水文效益的定量评价提供科学依据。 | 高鹏 杨慧玲 张光灿 周泽福 | 2008 | Journal of Forestry Research2008，19，3： | 0 |
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